Trolley



E. KRER Sept. 8, 1931.

TROLLEY Filed Marsh 24, 1930 latented Sept. 8, 1931 UNITED STATES ERNSTKRNER, on sTUTTGARn-*GnRa/r-nN-Y TROLEY Application led March' 24, 1930,Serial No."4381,565,=:and\imermanyzllfayn,A929. i

My invention relates to improvements in trolleys, and the object of theimprovements is to provide a trolley in which the trolley wheel and itsbearing may be readily removed 5 from the head of the pole. With thisobject in view my invention consists in mounting the trolley wheel on apivot bolt and ixing the said bolt to the head of the trolley pole fromone side thereof and so that it can be removed from the said headtogether with the trolley wheel and its bearing. Other objects of theimprovements will appear from the following description.

For the purpose of explaining the inven- 15 tion an example embodyingthe same has been illustrated in the accompanying drawing showing asectional elevation of the trolley.

To the trolley pole a1 a head or harp a is secured and the said head isformed with a lug -z' formed with an internally screw-thread ed borehaving a pivot bolt b screwing therein, the said pivot bolt being passedthrough the whole length of the bore and being formed with a slot b2adapted for engagement with a screw driver. On the pivot bolt 7. Z) ananti-friction bearing is mounted which consists of inner race rings jl,outer rings jz, and balls j, the inner race rings jl being fixed to thebolt Z) and held in position by means of a head c3 of the bolt b andsleeves k. The outer race rings j2 are fitted within a cylindrical boreof a hub d formed with an inwardly directed flange d1 embracing theinner sleeve la and having a lid d-2 secured thereto by means of screwsm, the said flange and lid confining the anti-friction bearing in a dustand oil proof manner. The race rings f2 are held in position within thehub by means of the flange d1, a sleeve n and a flange Z4 projectinginwardly from the lid d2. The

hub d is formed at its middle with a flange d3, and .to the said flangethe ring f of the trolley wheel is secured for example by means d Lofscrews f2.

To the inner face of the ange d3 an annular disk e of hard copper or thelike is se- .cured by means of the screws f2. The ring ve is engaged bya current collector ring g made from carbon or the like and having its nouter portion fitted in a flanged ring g3 secured ,to boltsg1.sldingly:engagingn bores g4 fof thekhea'rl a, .springs g2 being,disposed i between the ring lgsv an'dl the. inner'face of. the

head a 5 for? holding ther collector ring g ,in contact with the ring e.Preferably the 55 ring, g Aiselectrical lyconnected with the head a bymeans f iexiblefleads'.h .fixed to washers Zbl' and -h making, contact,respectively gwith lthel ring'gand 'thefhead a, the 1sli'rings g?bearing onv the rings`7t1' and' tzforl holding 00 the same in-electricalocontactlavitlrthe ring gxand the` heada. i

HIf 'iti is desired, to. replace' "thetrolleywth another one' it,` isonly necessary. to zscrew the bolt b outwardly. byu means of, ascrewAdriver set into the.. notchl b2, `whicreuponn'the `said bolt, theyantilfriction bearing .andthe ,trdlley wheel mountedthereon are removedfromlthe head a. uAfter,.di,smountingftheebelt b and thepartsrarriedtheneby,fromth headthe p79 collectorV ringf may be,inspecteda and it can .be readily.. "neplacd' with another .collectorring Vif necessary: Further .theprings gz can' be,I inspected. 1f.. it.is` desiredto .remove vonly the ring foflthe trolley wheclithe,.nuts`of the screwstfz :are removed, whereupolhe rim. can be readilywithdrawrifroni' thekflafngc d1. i. In asimilarway 4.thelrim fofV the.trolley or theji whole trolley areagain .mountedon the fiange d3 or thehead c.. -80

l.' trolley, comprising the head of the tr'olley pole, a bearing memberxed to said head, a hub rotatable on Asaid bearing mem ber and formedwith a flange, a trolley wheel and a ring of conductive material xed tosaid flange from opposite sides thereof, and a collector ring infrictional engagement with said ring of conductive material and mountedon said head. Y 90 2. A trolley, comprising the head of the trolleypole, a bearing member fixed to said head, a trolley wheel mounted onsaid bearing member, a collector ring in sliding engagement with saidtrolley wheel, bolts car- 9 rying sai-d collector ring and slidablysupported in bores of said head, springs acting on said collector ringfor forcing the same into engagement with said trolley Vwheel, washerslocated between the ends of said springs and said collector ring andhead, and a flexible conductor electrically connecting said washers.

3. A trolley, comprising the head of the trolley pole, a bearing memberfixed t0 said head, a hub rotatable on said bearing member and formedwith a llange, a trolley wheel and a ring of conductive material fixedto said flange from opposite sides thereof, and electrical contact meansin engagement with said ring and mounted on said head.

4. In apparatus of the class described, the combination with a trolleyharp, of a stud having threaded connection with said harp, and a trolleyassembly mounted on said stud and removable bodily therewith from saidharp, said assembly comprising anti-friction bearing means on said stud,a hub member journalled on said bearing means and constituting a closuretherefor, said hub member being provided with an annular radiallydisposed flange, a trolley rim secured one side of the llange on saidhub member, and electrical Contact means carried by said harp andyieldingly engaging the opposite side of the said flange.

5. In apparatus of the class described, the combination with a trolleyharp, of a stud having threaded connection with said harp, and a trolleyassembly mounted on said stud and removable bodily therewith from saidharp, said assembly Comprising anti-frio tion bearing means on saidstu-d, and a hub member j-ournalled on said bearing means andconstituting a closure therefor, said hub member being provided with anannular Vradially disposed llange, a trolley rim in engagement with oneside of the flange on said hub member, a current conducting annularplate engaging the opposite side of the said llange, means fordetachably securing said trolley rim, hub flange and plate together,

and electrical contact means carried by said harp and yleldinglyengaging said plate.

In testlmony whereof I hereunto allix my signature.

ERNST KORNER.

